// @mixin cardBg($leftColor, $rightColor) {
//   background: -webkit-linear-gradient(to right, $leftColor, $rightColor);
//   background: -o-linear-gradient(to right, $leftColor, $rightColor);
//   background: -moz-linear-gradient (to right, $leftColor, $rightColor);
//   background: linear-gradient(to right, $leftColor, $rightColor);
// }
.cardBg() {
  background: -webkit-linear-gradient(to right, @leftColor, @rightColor);
  background: -o-linear-gradient(to right, @leftColor, @rightColor);
  background: -moz-linear-gradient (to right, @leftColor, @rightColor);
  background: linear-gradient(to right, @leftColor, @rightColor);
}